Method and device for transmitting uplink control channel in wireless communication system

ABSTRACT

Disclosed is a method performed by a terminal in a wireless communication system including receiving, from a base station, physical uplink control channel (PUCCH) configuration information including first information on a number of plural slots for repetition of a PUCCH transmission, second information on a number of consecutive symbols for the PUCCH transmission, and third information on at least one physical resource block (PRB) for the PUCCH transmission, receiving, from the base station, downlink control information (DCI), determining the plural slots for the repetition of the PUCCH transmission starting from a first slot indicated to the terminal by the DCI, based on the PUCCH configuration information, and transmitting, to the base station, a PUCCH at the determined plural slots based on the at least one PRB according to the third information, wherein each of the determined plural slots has the number of consecutive symbols for the PUCCH transmission according to the second information and the terminal does not perform the PUCCH transmission at a slot having a number of symbols available for PUCCH transmission smaller than the number of consecutive symbols for the PUCCH transmission according to the second information.

PRIORITY

This application is a Continuation Application of U.S. patentapplication Ser. No. 16/609,664, filed on Oct. 30, 2019, which is aNational Phase Entry of PCT International Application No.PCT/KR2018/005087 which was filed on May 2, 2018, and claims priority toKorean Patent Application No. 10-2017-0056876, which was filed on May 4,2017, the content of each of which is incorporated herein by reference.

TECHNICAL FIELD

The disclosure relates to a method and an apparatus for transmitting anuplink control channel in a wireless cellular communication system.

BACKGROUND ART

To meet the demand for wireless data traffic having increased sincedeployment of 4G communication systems, efforts have been made todevelop an improved 5G or pre-5G communication system. Therefore, the 5Gor pre-5G communication system is also called a ‘Beyond 4G Network’ or a‘Post LTE System’. The 5G communication system is considered to beimplemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, soas to accomplish higher data rates. To decrease propagation loss of theradio waves and increase the transmission distance, the beamforming,massive multiple-input multiple-output (MIMO), Full Dimensional MIMO(FD-MIMO), array antenna, an analog beam forming, large scale antennatechniques are discussed in 5G communication systems. In addition, in 5Gcommunication systems, development for system network improvement isunder way based on advanced small cells, cloud Radio Access Networks(RANs), ultra-dense networks, device-to-device (D2D) communication,wireless backhaul, moving network, cooperative communication,Coordinated Multi-Points (CoMP), reception-end interference cancellationand the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) andsliding window superposition coding (SWSC) as an advanced codingmodulation (ACM), and filter bank multi carrier (FBMC), non-orthogonalmultiple access (NOMA), and sparse code multiple access (SCMA) as anadvanced access technology have been developed.

The Internet, which is a human centered connectivity network wherehumans generate and consume information, is now evolving to the Internetof Things (IoT) where distributed entities, such as things, exchange andprocess information without human intervention. The Internet ofEverything (IoE), which is a combination of the IoT technology and theBig Data processing technology through connection with a cloud server,has emerged. As technology elements, such as “sensing technology”,“wired/wireless communication and network infrastructure”, “serviceinterface technology”, and “Security technology” have been demanded forIoT implementation, a sensor network, a Machine-to-Machine (M2M)communication, Machine Type Communication (MTC), and so forth have beenrecently researched. Such an IoT environment may provide intelligentInternet technology services that create a new value to human life bycollecting and analyzing data generated among connected things. IoT maybe applied to a variety of fields including smart home, smart building,smart city, smart car or connected cars, smart grid, health care, smartappliances and advanced medical services through convergence andcombination between existing Information Technology (IT) and variousindustrial applications.

In line with this, various attempts have been made to apply 5Gcommunication systems to IoT networks. For example, technologies such asa sensor network, Machine Type Communication (MTC), andMachine-to-Machine (M2M) communication may be implemented bybeamforming, MIMO, and array antennas. Application of a cloud RadioAccess Network (RAN) as the above-described Big Data processingtechnology may also be considered to be as an example of convergencebetween the 5G technology and the IoT technology.

Meanwhile, a need of a method of transmitting a PUCCH in a 5Gcommunication system has appeared.

DISCLOSURE OF INVENTION Technical Problem

The disclosure relates to a method of transmitting a long PUCCH in aplurality of slots, and provides a method of configuring repetitive longPUCCH transmission and a method and an apparatus by which a terminalperforms long PUCCH transmission in a plurality of slots according tothe method of configuring the repetitive long PUCCH transmission whenthere is a slot through which long PUCCH transmission cannot beperformed during transmission in the plurality of slots or when longPUCCH transmission cannot be performed in the number of OFDM symbolsconfigured in a specific slot.

Solution to Problem

In accordance with an aspect of the disclosure, a method performed by aterminal in a wireless communication system includes receiving, from abase station, physical uplink control channel (PUCCH) configurationinformation including first information on a number of plural slots forrepetition of a PUCCH transmission, second information on a number ofconsecutive symbols for the PUCCH transmission, and third information onat least one physical resource block (PRB) for the PUCCH transmission,receiving, from the base station, downlink control information (DCI),determining the plural slots for the repetition of the PUCCHtransmission starting from a first slot indicated to the terminal by theDCI, based on the PUCCH configuration information, and transmitting, tothe base station, a PUCCH at the determined plural slots based on the atleast one PRB according to the third information, wherein each of thedetermined plural slots has the number of consecutive symbols for thePUCCH transmission according to the second information, and wherein theterminal does not perform the PUCCH transmission at a slot having anumber of symbols available for PUCCH transmission smaller than thenumber of consecutive symbols for the PUCCH transmission according tothe second information.

Advantageous Effects of Invention

An embodiment of the disclosure relates to a method of transmitting along PUCCH in a plurality of slots, and through a method of configuringrepetitive long PUCCH transmission and a method by which the terminalperforms long PUCCH transmission in the plurality of slots when there isa slot through which long PUCCH transmission cannot be performed duringtransmission or when long PUCCH transmission cannot be performed throughthe number of OFDM symbols configured in a specific slot, it is possibleto improve uplink transmission coverage of the terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates the basic structure of time-frequency regions in theLTE system;

FIG. 2 illustrates an example in which 5G services are multiplexed andtransmitted in one system;

FIGS. 3A to 3C illustrates an embodiment of a communication system towhich the disclosure is applied;

FIG. 4 illustrates a first embodiment of the disclosure;

FIGS. 5A and 5B illustrate eNB and terminal procedures according to thefirst embodiment of the disclosure;

FIG. 6 illustrates a second embodiment of the disclosure;

FIG. 7 illustrates a third embodiment of the disclosure;

FIGS. 8A and 8B illustrate eNB and terminal procedures according to thethird embodiment of the disclosure;

FIG. 9 illustrates an eNB apparatus according to the disclosure; and

FIG. 10 illustrates a terminal apparatus according to the disclosure.

MODE FOR THE INVENTION

Hereinafter, embodiments of the disclosure will be described in detailwith reference to the accompanying drawings. In the followingdescription of the disclosure, a detailed description of known functionsor configurations incorporated herein will be omitted when it may makethe subject matter of the disclosure rather unclear. The terms whichwill be described below are terms defined in consideration of thefunctions in the disclosure, and may be different according to users,intentions of the users, or customs. Therefore, the definitions of theterms should be made based on the contents throughout the specification.

The advantages and features of the disclosure and ways to achieve themwill be apparent by making reference to embodiments as described belowin detail in conjunction with the accompanying drawings. However, thedisclosure is not limited to the embodiments set forth below, but may beimplemented in various different forms. The following embodiments areprovided only to completely disclose the disclosure and inform thoseskilled in the art of the scope of the disclosure, and the disclosure isdefined only by the scope of the appended claims. Throughout thespecification, the same or like reference numerals designate the same orlike elements.

Here, it will be understood that each block of the flowchartillustrations, and combinations of blocks in the flowchartillustrations, can be implemented by computer program instructions.These computer program instructions can be provided to a processor of ageneral purpose computer, special purpose computer, or otherprogrammable data processing apparatus to produce a machine, such thatthe instructions, which execute via the processor of the computer orother programmable data processing apparatus, create means forimplementing the functions specified in the flowchart block or blocks.These computer program instructions may also be stored in a computerusable or computer-readable memory that can direct a computer or otherprogrammable data processing apparatus to function in a particularmanner, such that the instructions stored in the computer usable orcomputer-readable memory produce an article of manufacture includinginstruction means that implement the function specified in the flowchartblock or blocks. The computer program instructions may also be loadedonto a computer or other programmable data processing apparatus to causea series of operational steps to be performed on the computer or otherprogrammable apparatus to produce a computer implemented process suchthat the instructions that execute on the computer or other programmableapparatus provide steps for implementing the functions specified in theflowchart block or blocks.

And each block of the flowchart illustrations may represent a module,segment, or portion of code, which includes one or more executableinstructions for implementing the specified logical function(s). Itshould also be noted that in some alternative implementations, thefunctions noted in the blocks may occur out of the order. For example,two blocks shown in succession may in fact be executed substantiallyconcurrently or the blocks may sometimes be executed in the reverseorder, depending upon the functionality involved.

As used herein, the “unit” refers to a software element or a hardwareelement, such as a Field Programmable Gate Array (FPGA) or anApplication Specific Integrated Circuit (ASIC), which performs apredetermined function. However, the “unit does not always have ameaning limited to software or hardware. The “unit” may be constructedeither to be stored in an addressable storage medium or to execute oneor more processors. Therefore, the “unit” includes, for example,software elements, object-oriented software elements, class elements ortask elements, processes, functions, properties, procedures,sub-routines, segments of a program code, drivers, firmware,micro-codes, circuits, data, database, data structures, tables, arrays,and parameters. The elements and functions provided by the “unit” may beeither combined into a smaller number of elements, “unit” or dividedinto a larger number of elements, “unit”. Moreover, the elements and“units” may be implemented to reproduce one or more CPUs within a deviceor a security multimedia card.

Hereinafter, embodiments of the disclosure will be described in detailwith reference to the accompanying drawings. In the followingdescription of the disclosure, a detailed description of known functionsor configurations incorporated herein will be omitted when it may makethe subject matter of the disclosure rather unclear. The terms whichwill be described below are terms defined in consideration of thefunctions in the disclosure, and may be different according to users,intentions of the users, or customs. Therefore, the definitions of theterms should be made based on the contents throughout the specification.

Further, the detailed description of embodiments of the disclosure ismade mainly based on a wireless communication system based on OFDM,particularly 3GPP EUTRA standard, but the subject matter of thedisclosure can be applied to other communication systems having asimilar technical background and channel form after a littlemodification without departing from the scope of the disclosure and theabove can be determined by those skilled in the art.

Meanwhile, research on the coexistence of new 5G communication (orcalled NR communication in the disclosure) and conventional LTEcommunication in the same spectrum in a mobile communication system isbeing conducted.

The disclosure relates to a wireless communication system and, moreparticularly, to a method and an apparatus in which a terminal capableof transmitting and receiving data in at least one of different wirelesscommunication systems existing in one carrier frequency or a pluralityof carrier frequencies transmits and receives data to and from each ofthe communication systems.

In general, a mobile communication system is developed to provide voiceservices while guaranteeing mobility of users. The mobile communicationsystem has gradually expanded its service scope from voice to dataservices. In recent years, the mobile communication system has evolvedto a degree that it can provide high-speed data services. Though, sinceresources are lacking and users demand higher speed services in themobile communication system providing a current service, a furtherimproved mobile communication system is needed.

To meet the demands, standardization of long term evolution (LTE) isbeing conducted by the 3rd generation partnership project (3 GPP) as oneof the next generation mobile communication systems that are beingdeveloped. LTE is a technology of implementing high speed packet-basedcommunication with a transmission rate of up to about 100 Mbps. To thisend, several methods are being discussed, including a method of reducingthe number of nodes located on a communication channel by simplifying anetwork architecture or a method of making wireless protocols theclosest to a wireless channel.

When decoding fails at the initial transmission, the LTE system employshybrid automatic repeat request (HARQ) that retransmits thecorresponding data on a physical layer. In the HARQ scheme, when areceiver does not accurately decode data, the receiver transmitsinformation (negative acknowledgement: NACK) informing a transmitter ofa decoding failure and thus the transmitter may re-transmit thecorresponding data on the physical layer. The receiver increases datareception performance by combining the data retransmitted by thetransmitter with the data of which decoding has previously failed. Also,when the receiver accurately decodes data, the receiver transmitsinformation (acknowledgement: ACK) informing the transmitter of decodingsuccess and thus the transmitter may transmit new data.

FIG. 1 illustrates the basic structure of time-frequency regions, whichare radio resource regions where data or a control channel istransmitted in a downlink of an LTE system.

Referring to FIG. 1, the horizontal axis indicates the time region andthe vertical axis indicates the frequency region. A minimum transmissionunit in the time region is an OFDM symbol. One slot 106 consists ofN_(symb) OFDM symbols 102 and one subframe 105 consists of 2 slots. Thelength of one slot is 0.5 ms, and the length of one subframe is 1.0 ms.A radio frame 114 is a time region interval consisting of 10 subframes.A minimum transmission unit in the frequency region is a subcarrier, andthe bandwidth of an entire system transmission band consists of a totalof N_(BW) subcarriers 104.

A basic unit of resources in the time-frequency regions is a resourceelement (RE) 112 and may be indicated by an OFDM symbol index and asubcarrier index. A resource block (RB or physical resource block (PRB))108 is defined by N_(symb) consecutive OFDM symbols 102 in the timeregion and N_(RB) consecutive subcarriers 110 in the frequency region.Accordingly, one RB 108 may include N_(symb)×N_(RB) REs 112 in one slot.In general, a minimum transmission unit of data is the RB. In the LTEsystem, generally, N_(symb)=7 and N_(RB)=12. N_(BW) and N_(RB) areproportional to a system transmission bandwidth. The data rate increasesin proportion to the number of RBs scheduled for the terminal. The LTEsystem defines and operates 6 transmission bandwidths. In the case of anFDD system, in which the downlink and the uplink are divided accordingto frequency, a downlink transmission bandwidth and an uplinktransmission bandwidth may be different from each other. A channelbandwidth may indicate an RF bandwidth corresponding to a systemtransmission bandwidth. Table 1 provided below indicates a relationshipbetween a system transmission bandwidth and a channel bandwidth definedin the LTE system. For example, when the LTE system has a channelbandwidth of 10 MHz, the transmission bandwidth may consist of 50 RBs.

TABLE Channel 1.4 3 5 10 15 20 bandwidth BW_(channel)[MHz] Transmission6 15 25 50 75 100 bandwidth configuration

Downlink control information may be transmitted within first N OFDMsymbols in the subframe. Generally, N={1, 2, 3}. Accordingly, N may bevariable for each subframe according to an amount of control informationto be transmitted in the current subframe. The control information mayinclude a control channel transmission interval indicator indicating thenumber of OFDM symbols via which control information is to betransmitted, scheduling information associated with downlink data oruplink data, a HARQ ACK/NACK signal, or the like.

In the LTE system, the scheduling information of downlink data or uplinkdata is transmitted from the eNB to the UE through downlink controlinformation (DCI). The uplink (UL) is a radio link through which theterminal transmits data or control signals to the eNB, and the downlink(DL) is a radio link through which the eNB transmits data or controlsignals to the terminal. The DCI are defined in various formats. A DCIformat may be determined and applied for operation, based on whetherscheduling information is for uplink data (UP grant) or for downlinkdata (DL grant), whether it is compact DCI of which the controlinformation is small, whether spatial multiplexing using multipleantennas is applied, whether it is DCI for controlling power, and thelike. For example, DCI format 1 corresponding to scheduling controlinformation of downlink data (DL grant) may be configured to include atleast the following control information.

-   -   Resource allocation type 0/1 flag: indicates whether a resource        allocation type is type 0 or type 1. Type 0 applies a bitmap        scheme and allocates resources in units of resource block groups        (RBGs). In the LTE system, a basic scheduling unit is a resource        block (RB) expressed by time and frequency domain resources, and        an RBG includes a plurality of RBs and is used as a basic        scheduling unit in the type 0 scheme. Type 1 allows allocation        of a predetermined RB in an RBG.    -   Resource block assignment: indicates RBs allocated to data        transmission. Indicated resources are determined according to a        system bandwidth and a resource allocation scheme.    -   Modulation and coding scheme (MCS): indicates a modulation        scheme used for data transmission and the size of a transport        block, which is data to be transmitted.    -   HARQ process number: indicates a process number of HARQ.    -   New data indicator: indicates HARQ initial transmission or HARQ        retransmission.    -   Redundancy version: indicates a redundancy version of HARQ.    -   Transmit power control (TPC) command for physical uplink control        channel (PUCCH): indicates a transmission power control command        for a PUCCH which is an uplink control channel.

The DCI is transmitted through a physical downlink control channel(PDCCH) or an enhanced PDCCH (EPDCCH), which is a downlink physicalcontrol channel, via a channel-coding and modulation process.

In general, the DCI is channel-coded independently for each terminal,and is then configured and transmitted as an independent PDCCH. In thetime region, a PDCCH is mapped and transmitted during the controlchannel transmission interval. A mapping of the PDCCH in the frequencyregion is determined by an identifier (ID) of each terminal, and ispropagated to the entire system transmission band.

Downlink data is transmitted through a physical downlink shared channel(PDSCH), which is a physical downlink data channel. The PDSCH istransmitted after the control channel transmission interval, and thedetailed mapping location in the frequency region and schedulinginformation such as the modulation scheme are indicated through DCItransmitted through the PDCCH.

Via an MCS formed of 5 bits in the control information included in theDCI, the eNB may report the modulation scheme applied to a PDSCH to betransmitted to the terminal and the size of data (transport block size(TBS)) to be transmitted. The TBS corresponds to the size before channelcoding for error correction is applied to the data (TB) to betransmitted by the eNB.

The modulation scheme supported by the LTE system includes QuadraturePhase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (16QAM),and 64QAM. Modulation orders (Qm) correspond to 2, 4, and 6respectively. That is, in the case of the QPSK modulation, 2 bits aretransmitted per symbol. In the case of the 16QAM modulation, 4 bits aretransmitted per symbol. In the case of 64QAM modulation, 6 bits aretransmitted per symbol.

Unlike LTE Rel-8, 3GPP LTE Rel-10 has adopted a bandwidth extensiontechnology in order to support a larger amount of data transmission. Thetechnology called bandwidth extension or carrier aggregation (CA) mayexpand the band and thus increase the amount of data capable of beingtransmitted through the expanded band compared to the LTE Rel-8terminal, which transmits data in one band. Each of the bands is calleda component carrier (CC), and the LTE Rel-8 terminal is defined to haveone component carrier for each of the downlink and the uplink. Further,a group of uplink component carriers connected to downlink componentcarriers through SIB-2 is called a cell. An SIB-2 connection relationbetween the downlink component carrier and the uplink component carrieris transmitted through a system signal or a higher layer signal. Theterminal supporting CA may receive downlink data through a plurality ofserving cells and transmit uplink data.

In Rel-10, if the eNB has difficulty in transmitting a physical downlinkcontrol channel (PDCCH) to a particular terminal in a particular servingcell, the eNB may transmit the PDCCH in another serving cell andconfigure a carrier indicator field (CIF) as a field indicating that thecorresponding PDCCH is a physical downlink shared channel (PDSCH) or aphysical uplink shared channel (PUSCH) of the other serving cell. TheCIF may be configured in the terminal supporting CA. The CIF isdetermined to indicate another serving cell by adding 3 bits to thePDCCH in a particular serving cell, and the CIF is included only whencross-carrier scheduling is performed, and if CIF is not included,cross-carrier scheduling is not performed. If the CIF is included indownlink allocation information (DL assignment), the CIF is defined toindicate a serving cell to which a PDSCH scheduled by the DL assignmentis transmitted. When the CIF is included in uplink resource allocationinformation (UL grant), the CIF is defined to indicate a serving cell towhich a PUSCH scheduled by the UL grant is transmitted.

As described above, carrier aggregation (CA), which is a bandwidthexpansion technology, is defined in LTE-10, and thus a plurality ofserving cells may be configured in the terminal. The terminalperiodically or aperiodically transmits channel information of theplurality of serving cells to the eNB for data scheduling of the eNB.The eNB schedules and transmits data for each carrier, and the terminaltransmits A/N feedback of data transmitted for each carrier. LTE Rel-10is designed to transmit A/N feedback which is a maximum of 21 bits and,when transmission of A/N feedback and transmission of channelinformation overlap in one subframe, designed to transmit the A/Nfeedback and discard the channel information. LTE Rel-11 is designed tomultiplex A/N feedback and channel information of one cell and transmitthe A/N feedback corresponding to a maximum of 22 bits and the channelinformation of one cell in transmission resources of PUCCH format 3through PUCCH format 3.

A scenario in which a maximum of 32 serving cells are configured isassumed in LTE-13, and the concept of expanding the number of servingcells up to a maximum of 32 serving cells has been constructed using notonly a licensed band but also an unlicensed band. Further, LTE Rel-13provides an LTE service in an unlicensed band such as a band of 5 GHz inconsideration of limitation on the number of licensed bands, such as theLTE frequency, which is called licensed assisted access (LAA). Carrieraggregation technology of LTE is applied to LAA to support an LTE cell,which is a licensed band, as a P cell and an LAA cell, which is anunlicensed band, as an S cell. Accordingly, as in LTE, feedbackgenerated in the LAA cell corresponding to the SCell should betransmitted only in the PCell, and the LAA cell may freely apply adownlink subframe and an uplink subframe. Unless specially mentioned inthis specification, “LTE” refers to all technologies evolved from LTE,such as LTE-A and LAA.

Meanwhile, as a post-LTE communication system, a 5^(th)-generationwireless cellular communication system (hereinafter, referred to as “5G”or “NR” in the specification) should freely reflect the variousrequirements of users and service providers, so that services that meetvarious requirements should be supported.

Accordingly, 5G may define various 5G services such as enhanced mobilebroadband communication (hereinafter, referred to as eMBB in thisspecification), massive machine-type communication (hereinafter,referred to as mMTC in this specification), and ultra-reliable andlow-latency communications (hereinafter, referred to as URLLC in thisspecification) by the technology for satisfying requirements selectedfor 5G services, among requirements of a maximum terminal transmissionrate of 20 Gbps, a maximum terminal speed of 500 km/h, a maximum delaytime of 0.5 ms, and a terminal access density of 1,000,000terminals/km².

For example, in order to provide eMBB in 5G, a maximum transmissionspeed of the terminal corresponding to 20 Gbps may be provided indownlink and a maximum transmission speed of the terminal correspondingto 10 Gbps may be provided in uplink from the viewpoint of one eNB.Also, the average transmission rate of the terminal that is actuallyexperienced should be increased. In order to satisfy such requirements,improvement of transmission/reception technologies, including a furtherimproved multi-input multi-output transmission technology, is needed.

Also, in order to support an application service such as the Internet ofthings (IoT), mMTC is being considered for 5G. The mMTC has requirementsof supporting access by massive numbers of terminals within a cell,improving coverage of the terminal, increasing effective batterylifetime, and reducing the costs of the terminal in order to efficientlysupport IoT. IoT connects various sensors and devices to provide acommunication function, and thus should support a large number ofterminals (for example, 1,000,000 terminals/km²) within a cell. Further,in the mMTC, the terminal is highly likely to be located in a shade areasuch as the basement of a building or an area that cannot be covered bythe cell due to the characteristics of the service, and thus mMTCrequires wider coverage than the coverage provided by eMBB. The mMTC ishighly likely to be configured by low-price terminals, and it isdifficult to frequently change a battery of the terminal, so a longbattery life is needed.

Last, the URLLC is cellular-based wireless communication used for aparticular purpose and corresponds to a service used for remote controlof a robot or a machine device, industrial automation, unmanned aerialvehicles, remote health control, and emergency notification, and thusshould provide ultra-low-latency and ultra-reliable communication. Forexample, the URLLC should meet a maximum delay time shorter than 0.5 msand also has requirements to provide a packet error rate equal to orlower than 10-5. Therefore, for the URLLC, a transmit time interval(TTI) smaller than that of the 5G service such as the eMBB should beprovided and also it is required to design allocation of wide resourcesin a frequency band.

The services under consideration for adoption in the 5^(th)-generationwireless cellular communication system should be provided as a singleframework. That is, in order to efficiently manage and controlresources, it is preferable to perform control and transmission suchthat the services are integrated into one system rather than toindependently operate the services.

FIG. 2 illustrates an example in which services under consideration by5G are transmitted through one system.

In FIG. 2, frequency-time resources 201 used in 5G may include afrequency axis 202 and a time axis 203. FIG. 2 illustrates an example inwhich 5G operates eMBB 205, mMTC 206, and URLLC 207 within oneframework. Further, as a service which is additionally underconsideration for implementation in 5G, an enhanced mobilebroadcast/multicast service (eMBMS) 208 for providing a cellular-basedbroadcast service may be considered. The services considered by 5G, suchas the eMBB 205, the mMTC 206, the URLLC 207, and the eMBMS 208 may bemultiplexed and transmitted through time division multiplexing (TDM) orfrequency division multiplexing (FDM) within one system frequencybandwidth operated by 5G, and spatial division multiplexing may be alsoconsidered. In the case of the eMBB 205, it is preferable to occupy andtransmit as many frequency bandwidths as possible for a particular timein order to provide the increased data transmission rate. Accordingly,it is preferable that the service of the eMBB 205 betime-division-multiplexed (TDM) with another service within the systemtransmission bandwidth 201, but it is also preferable that the serviceof the eMBB 205 be frequency-division-multiplexed (FDM) with otherservices within the system transmission bandwidth according to the needof the other services.

The mMTC 206 needs an increased transmission interval in order to securewide coverage unlike other services. Accordingly, transmission of themMTC 206 may secure the coverage by repeatedly transmitting the samepacket within the transmission interval. In order to simultaneouslyreduce the terminal complexity and the terminal price, the transmissionbandwidth within which the terminal is capable of performing receptionis limited. When the requirements described above are considered, it ispreferable that the mMTC 206 be frequency-division-multiplexed (FDM)with other services within the transmission system bandwidth 201 of 5G.

It is preferable that the URLLC 207 has a shorter transmit time interval(TTI) compared to other services in order to meet ultra-low latencyrequirements required by the service. Also, in order to meet theultra-reliability requirement, a low coding rate is needed, so that itis preferable to occupy a wide frequency bandwidth. When therequirements of URLLC 207 are considered, it is preferable that theURLLC 207 be time-division-multiplexed (TDM) with other services withinthe transmission system bandwidth 201 of 5G.

The aforementioned services may have different transmission/receptionschemes and transmission/reception parameters in order to satisfyrequirements of the services. For example, the services may havedifferent numerologies depending on the requirements thereof. Thenumerology includes a cyclic prefix (CP) length, subcarrier spacing, anOFDM symbol length, and a transmission interval length (TTI) in anorthogonal frequency division multiplexing (OFDM) or an orthogonalfrequency division multiple access (OFDMA)-based communication system.In an example in which the services have different numerologies, theeMBMS 208 may have a longer CP than other services. Since the eMBMStransmits higher traffic based on broadcasting, the same data may betransmitted in all cells. At this time, if signals received by aplurality of cells reach the CP length, the terminal may receive anddecode all of the signals and thus obtain a single frequency network(SFN) diversity gain. Accordingly, even a terminal located at a cellboundary may have an advantage of receiving broadcasting informationwithout any coverage restriction. However, if the CP length isrelatively longer than other services, waste occurs due to CP overheadin order to support the eMBMS in 5G, and thus a longer OFDM symbol isrequired than in the case of other services, which results in narrowersubcarrier spacing compared to other services.

Further, as an example in which different numerologies are used forservices in 5G, a shorter OFDM symbol may be required as a shorter TTIis needed compared to other services, and moreover, wider subcarrierspacing may be required in the case of URLLC.

Meanwhile, one TTI may be defined as one slot and may consist of 14 OFDMsymbols or 7 OFDM symbols in 5G. Accordingly, in the case of subcarrierspacing of 15 kHz, one slot has a length of 1 ms or 0.5 ms. Further, oneTTI may be defined as one mini-slot or sub-slot for emergencytransmission and transmission in an unlicensed band in 5G, and onemini-slot may have OFDM symbols ranging from 1 to (the number of OFDMsymbols of the slot) −1. If the length of one slot corresponds to 14OFDM symbols, the length of the mini-slot may be determined as one of 1to 13 OFDM symbols. The length of the slot or the mini-slot may bedefined according to a standard, and may be transmitted through ahigher-layer signal or system information and received by the terminal.Instead of the mini-slot or the sub slot, the slot may be determined tohave the length from 1 to 14 OFDM symbols, and the length of the slotmay be transmitted by a higher layer signal or system information andthus received by the terminal.

The slot or the mini-slot may be defined to have various transmissionformats, and may be classified into the following formats.

DL-only slot or full DL slot: includes only downlink sections andsupports only downlink transmission.

DL-centric slot: includes downlink sections, GP, and uplink sections,and has a larger number of OFDM symbols in the downlink section than inthe uplink section.

UL-centric slot: includes downlink sections, GP, and uplink sections,and has a smaller number of OFDM symbols in the downlink section thanthose in the uplink section.

UL-only slot or full-DL slot: includes only uplink sections and supportsonly uplink transmission.

In the above description, only the slot formats are divided, but themini-slot may be also classified in the same way. For example, themini-slot may be divided into a DL-only mini-slot, a DL-centricmini-slot, a UL-centric mini-slot, and a UL-only mini-slot.

When the uplink control channel is configured to be transmitted by theterminal in a plurality of slots, a method of configuring repetitivetransmission of the long PUCCH is needed. A method by the terminalperforms long PUCCH transmission in a plurality of slots is needed whenthere is a slot through which long PUCCH transmission cannot beperformed during transmission or if long PUCCH transmission is notperformed over the number of OFDM symbols configured in a specific slotaccording to a configuration method for repetitive long PUCCHtransmission. According to an embodiment of the disclosure, a method bywhich the eNB indicates a configuration for repetitive long PUCCHtransmission to the terminal is provided for transmission and receptionof an uplink control channel in the plurality of slots or mini-slots ofthe eNB and the terminal. A method by which the terminal receives theconfiguration and transmits the uplink control channel in the pluralityof slots or mini-slots is provided. A transmission interval (or atransmission start symbol and end symbol) of the uplink control channelmay vary depending on the format of the slots or the mini-slots. Thecase in which an uplink control channel having a short transmissioninterval (hereinafter, referred to as a short PUCCH in the disclosure)to minimize a transmission delay and an uplink control channel having along transmission interval (hereinafter, referred to as a long PUCCH inthe disclosure) to acquire sufficient cell coverage coexist in one slotor a plurality of slots and the case in which the uplink control channelis multiplexed in one slot or a plurality of slots, such as transmissionof an uplink sounding signal like an SRS, should be considered.Accordingly, a method of determining and transmitting the number of longPUCCH transmission symbols in each slot if the terminal repeatedlyperforms long PUCCH transmission in a plurality of slots is provided.

Hereinafter, exemplary embodiments of the disclosure will be describedin detail with reference to the accompanying drawings. It should benoted that the same elements will be designated by the same referencenumerals although they are shown in different drawings. Further, adetailed description of a known function and configuration which maymake the subject matter of the disclosure unclear will be omitted.

In addition, although the following detailed description of embodimentsof the disclosure will be directed to the LTE and 5G systems, it can beunderstood by those skilled in the art that the main gist of thedisclosure may also be applied to any other communication system havingsimilar technical backgrounds and channel formats, with a slightmodification, without substantially departing from the scope of thedisclosure.

Hereinafter, the 5G system for transmitting and receiving data in the 5Gcell will be described.

FIG. 3A illustrates an embodiment of a communication system to which thedisclosure is applied. The above-described figures illustrate the formin which the 5G system is operated, and schemes proposed by thedisclosure can be applied to the system of FIG. 3A.

Referring to FIG. 3A, the case in which a 5G cell 302 is operated in oneeNB 301 in a network is illustrated. A terminal 303 is a 5G-capableterminal having a 5G transmission/reception module. The terminal 303 mayacquire synchronization through a synchronization signal transmitted inthe 5G cell 302, receive system information, and transmit and receivedata to and from the eNB 301 through the 5G cell 302. In this case,there is no limitation as to the duplexing method of the 5G cell 302.Uplink control transmission may be performed through the 5G cell 302 ifthe 5G cell is a P cell. In the 5c system, the 5G cell may have aplurality of serving cells, and may support a total of 32 serving cells.It is assumed that the BS 301 includes a 5G transmission/receptionmodule (system) in the network and can manage and operate the 5G systemin real time.

Subsequently, a procedure in which the eNB 301 configures 5G resourcesand transmits and receives data to and from the 5G-capable terminal 303in resources for 5G will be described with reference to FIG. 3B.

In step 311, the eNB 301 may transmit synchronization for 5G, systeminformation, and higher-layer configuration information to the5G-capable terminal 303. With respect to the synchronization signal for5G, separate synchronization signals may be transmitted for eMBB, mMTC,and URCCL using different numerologies, and a common synchronizationsignal may be transmitted through specific 5G resources using onenumerology. With respect to the system information, common systeminformation may be transmitted through specific 5G resources using onenumerology, and separate system information may be transmitted for eMBB,mMTC, and URLLC using different numerologies. The system information andthe higher configuration information may include configurationinformation indicating whether to use the slot or the mini-slot for datatransmission and reception, the number of OFDM symbols of the slot orthe mini-slot, and the numerology therefor. Further, if reception of adownlink common control channel is configured in the terminal, thesystem information and the higher configuration information may includeconfiguration information related to reception of the downlink commoncontrol channel.

In step 312, the eNB 301 may transmit and receive data for the 5Gservice to and from the 5G-capable terminal 303 in 5G resources.

Subsequently, a procedure in which the 5G-capable terminal 303 receivesthe configuration of 5G resources from the eNB 301 and transmits andreceives data through the 5G resources will be described with referenceto FIG. 3C.

In step 321, the 5G-capable terminal 303 acquires synchronization fromthe synchronization signal for 5G transmitted by the eNB 301 andreceives the system information and the higher configuration informationtransmitted by the eNB 301. With respect to the synchronization signalfor 5G, separate synchronization signals may be transmitted for eMBB,mMTC, and URCCL using different numerologies, and a commonsynchronization signal may be transmitted through specific 5G resourcesusing one numerology. With respect to the system information, commonsystem information may be transmitted through specific 5G resourcesusing one numerology, and separate system information may be transmittedfor eMBB, mMTC, and URLLC using different numerologies. The systeminformation and the higher configuration information may includeconfiguration information indicating whether to use the slot or themini-slot for data transmission and reception, the number of OFDMsymbols of the slot or the mini-slot, and the numerology therefor.Further, if reception of a downlink common control channel is configuredin the terminal, the system information and the higher configurationinformation may include configuration information related to receptionof the downlink common control channel.

In step 322, the 5G-capable terminal 303 may transmit and receive datafor the 5G service to and from the eNB 301 in 5G resources.

In the state in which the 5G system of FIG. 3 is operated by the slot orthe mini-slot, uplink control channels such as a long PUCCH, a shortPUCCH, or an SRS may coexist within one TTI or one slot. At this time,in order to prevent resource collision and maximize the resource use, amethod of indicating a long PUCCH transmission interval (or a startsymbol or an end symbol) and a method of transmitting a long PUCCH onthe basis of the indication are described.

First, FIG. 4 illustrates a first embodiment of the disclosure.

FIG. 4 illustrates a method by which the terminal determines the longPUCCH transmission interval (or the start symbol and the end symbol) onthe basis of the slot and transmits an uplink control channel, but itshould be noted that FIG. 4 may also be applied to the case in which theterminal determines the long PUCCH transmission interval (or the startsymbol and the end symbol) on the basis of the mini-slot and transmitsthe uplink control channel.

FIG. 4 shows multiplexing of a long PUCCH and a short PUCCH in afrequency region (FDM 400) and multiplexing of a long PUCCH and a shortPUCCH in a time region (TDM 401). First, a slot format in which the longPUCCH and the short PUCCH are multiplexed will be described withreference to FIG. 4. Reference numerals 420 and 421 indicate UL-centricslots in which uplink is mainly used in the slot (various names such asa subframe or a transmission time interval (TTI) may be used, but a slotwhich is a basic transmission unit is used in the disclosure) which is abasic transmission unit of 5G. In the UL-centric slot, most OFDM symbolsare used for the uplink, and all OFDM symbols may be used for uplinktransmission. Alternatively, in the UL-centric slot, some OFDM symbolsmay be used for downlink transmission, and if both the downlink and theuplink coexist in one slot, there may be a transmission gaptherebetween. In FIG. 4, a first OFDM symbol in one slot may be used fordownlink transmission, for example, downlink control channeltransmission 402, and symbols from a third OFDM symbol may be used foruplink transmission. A second OFDM symbol is used for the transmissiongap. In uplink transmission, uplink data channel transmission and uplinkcontrol channel transmission can be performed.

Subsequently, a long PUCCH 403 will be described. A control channel of along transmission interval is used to increase cell coverage, and thusmay be transmitted through a DFT-S-OFDM scheme for short carriertransmission rather than OFDM transmission. Accordingly, at this time,transmission should be performed using only consecutive subcarriers, andin order to obtain a frequency diversity effect, long transmissioninterval uplink control channels are configured at separated locationsas indicated by reference numerals 408 and 409. A separated distance 405in the frequency region should be smaller than the bandwidth supportedby the terminal, and transmission is performed using PRB-1 in the frontpart of the slot as indicated by reference numeral 408 and transmissionis performed using PRB-2 in the back part of the slot as indicated byreference numeral 409. The PRB is a physical resource block, which maybe the minimum transmission unit in the frequency region, and may bedefined by 12 subcarriers. Accordingly, the frequency distance betweenPRB-1 and PRB-2 should be smaller than the maximum bandwidth supportedby the terminal, and the maximum bandwidth supported by the terminal maybe equal to or smaller than the bandwidth 406 supported by the system.Frequency resources PRB-1 and PRB-2 may be configured in the terminalthrough a higher-layer signal and frequency resources may be mapped to abit field through a higher-layer signal. The frequency resources to beused may be indicated to the terminal through the bit field included inthe downlink control channel. Each of the control channel transmitted inthe front part of the slot 408 and the control channel transmitted inthe back part of the slot 409 may include uplink control information(UCI) 410 and a terminal reference signal 411, and it is assumed thatthe two signals are transmitted in different OFDM symbols in atime-division manner.

Subsequently, a short PUCCH 418 will be described. The short PUCCH maybe transmitted through both the DL-centric slot and the UL-centric slotand may generally be transmitted through the last symbol of the slot oran OFDM symbol in the back (for example, the last OFDM symbol, thesecond-to-last OFDM symbol, or the last two OFDM symbols). Of course,the short PUCCH can be transmitted at a random location within the slot.The short PUCCH may be transmitted using one OFDM symbol or a pluralityof OFDM symbols. In FIG. 4, the short PUCCH is transmitted in the lastsymbol 418 of the slot. Radio resources for the short PUCCH may beallocated in units of PRBs from the aspect of frequency, and a pluralityof consecutive PRBs may be allocated, or a plurality of PRBs separatedfrom each other in the frequency band may be allocated. The allocatedPRBs should be included in a band equal to or smaller than the frequencyband 407 supported by the terminal. The plurality of PRBs, which are theallocated frequency resources, may be configured in the terminal througha higher-layer signal, the frequency resources may be mapped to a bitfield through the higher-layer signal, and the frequency resources to beused may be indicated to the terminal by the bit field included in thedownlink control channel. Uplink control information 420 and ademodulation reference signal 421 should be multiplexed within one PRBin the frequency band, and there may be a method of transmitting ademodulation reference signal to one subcarrier for every two symbols,as indicated by reference numeral 412, a method of transmitting ademodulation reference signal to one subcarrier for every three symbols,as indicated by reference numeral 413, or a method of transmitting ademodulation reference signal to one subcarrier for every four symbols,as indicated by reference numeral 414. Schemes to be used by thedemodulation signal transmission methods 412, 413, and 414 may beconfigured through a higher signal. The terminal may multiplex andtransmit a demodulation reference signal and uplink control informationthrough a method indicated by reception of the higher layer signal.Alternatively, the method of transmitting the demodulation referencesignal may be determined according to the number of bits of the uplinkcontrol information 420. If the number of bits of the uplink controlinformation is small, the terminal may multiplex and transmit the uplinkcontrol information and the demodulation reference signal as indicatedby reference numeral 412. When the number of bits of the uplink controlinformation is small, a sufficient transmission code rate may beobtained even though many resources are not used for transmission of theuplink control information. If the number of bits of the uplink controlinformation is large, the terminal may multiplex and transmit the uplinkcontrol information and the demodulation reference signal as indicatedby reference numeral 414. If the number of bits of the uplink controlinformation is large, it is required to use many resources fortransmission of the uplink control information in order to reduce atransmission code rate.

Next, multiplexing of the long PUCCH and the short PUCCH will bedescribed below. In one slot 420, long PDCCHs and short PDCCHs ofdifferent UEs may be multiplexed in the frequency region, as indicatedby reference numeral 400. At this time, the eNB may configure frequencyresources of the short PUCCH and the long PUCCH of different terminalsso as to avoid overlapping each other, like the PRBs of FIG. 4. However,configuring transmission resources of the uplink control channels of allterminals differently wastes frequency resources regardless of whetherscheduling is performed, and is inappropriate when it is considered thatthe limited frequency resources should be used for uplink data channeltransmission rather than uplink control channel transmission.Accordingly, frequency resources of the short PUCCHs and the long PUCCHsof different terminals may overlap each other, in which case the eNB isrequired to perform scheduling and use transmission resources ofdifferent terminals so as to avoid collisions in one slot. However, ifcollisions between short PUCCH transmission resources and long PUCCHtransmission resources of different terminals in a specific slot cannotbe avoided, the eNB needs a method of preventing collisions betweenshort PUCCH transmission resources and long PUCCH transmissionresources, and the terminal needs a method of controlling long PUCCHtransmission resources according to the indication of the eNB. The shortPUCCH and long PUCCH transmission resources may be multiplexed in thetime region within one slot 421 through the method as indicated byreference numeral 401.

The disclosure provides a method of transmitting the long PUCCHregardless of the number of uplink OFDM symbols in the slot format orthe number of uplink OFDM symbols in one slot varying depending ontransmission of the uplink control channel in a short time region suchas the short PUCCH or the SRS. The method of the disclosure may belargely divided into three methods.

In a first method, if the eNB directly indicates long PUCCH transmissionresources in one slot to the terminal through a first signal, theterminal may perform long PUCCH transmission in the transmissionresources indicated in one slot through reception of the first signal.Alternatively, the eNB may implicitly (indirectly) indicate long PUCCHtransmission resources to the terminal through definition in thestandard for correlating the long PUCCH transmission resource with thenumber of uplink OFDM symbols or the number of GP OFDM symbols of theslot. The first signal may include a higher layer signal or a physicalsignal. The first signal may include the OFDM symbol interval (or thestart OFDM symbol and the end OFDM symbol) in the time region and PRBsin the frequency region for transmission of the long PUCCH. If theterminal receives a third signal indicating transmission of the SRS orthe short PUCCH of another terminal in specific OFDM symbols in one slotand the long PUCCH transmission having the OFDM symbol intervalimplicitly configured by the first signal is not possible, the terminalmay drop the long PUCCH transmission. Alternatively, the terminal maydetermine how many long PUCCH transmission OFDM symbols overlap the SRSor short PUCCH transmission OFDM symbols. If the number of collidedsymbols is within a preset threshold, the terminal may transmit the longPUCCH which punctures the overlapping OFDM symbols. Otherwise, theterminal may drop the long PUCCH transmission. Alternatively, theterminal may always transmit the long PUCCH which punctures OFDM symbolsthat overlap the SRS or short PUCCH transmission OFDM symbols. The thirdsignal and the threshold may be configured by a higher layer signal.Further, the threshold may be a constant corresponding to the number ofspecific OFDM symbols.

In a second method, if the eNB directly indicates long PUCCHtransmission resources in one slot to the terminal through the firstsignal and a second signal, the terminal may perform long PUCCHtransmission in the transmission resources indicated in one slot throughreception of the first signal. The first signal may include a higherlayer signal. The second signal may include a physical signal. The firstsignal may include available sets of the OFDM symbol interval (or thestart OFDM symbol and the end OFDM symbol) in the time region and PRBsin the frequency region for transmission of the long PUCCH. The secondsignal may select and indicate one of the available sets.

In a third method, the eNB directly/indirectly indicates long PUCCHtransmission resources in one slot to the terminal in advance throughthe first signal or definition in the standard for correlating the longPUCCH transmission resources with the number of uplink/downlink OFDMsymbols and the number of GP OFDM symbols in the slot, and reduces orcontrols the long PUCCH transmission resources in one slot, indicated inadvance through the second signal, in order to avoid a collision withuplink control channel transmission resources in a short time region.The terminal may determine in advance the long PUCCH transmissioninterval on the basis of reception of the first signal or theuplink/downlink OFDM symbols and the number of GP OFDM symbols in theslot. The terminal may perform long PUCCH transmission in one slot bycontrolling long PUCCH transmission resources in one slot throughreception of the second signal. The first signal and the second signalmay contain a higher signal, a physical signal, or a combination of ahigher signal and a physical signal. The first signal may include theOFDM symbol interval (or the start OFDM symbol and the end OFDM symbol)in the time region and PRBs in the frequency region for transmission ofthe long PUCCH. The second signal may include the OFDM symbol interval(or the start OFDM symbol and the end OFDM symbol) in the time regionand PRBs in the frequency region in which long PUCCH transmission cannotbe performed in one slot.

The first method is suitable for uplink control channel transmissionsuch as periodic channel information transmission configured in theterminal to be periodically transmitted without any scheduling grant.The second and third methods are suitable for uplink control channeltransmission such as HARQ-ACK transmission configured in the terminal tobe aperiodically transmitted by a scheduling grant. Accordingly, whetherto apply the first method, the second method, or the third method isdetermined according to whether the uplink control channel transmittedby the terminal is triggered by the scheduling grant or transmitteduplink control information is periodic channel information or HARQ-ACK.For example, the first method may be applied to the uplink controlchannel transmission configured to be transmitted by the terminalwithout the scheduling grant, and the second method may be applied tothe uplink control channel if transmission of the uplink control channelis triggered by the scheduling grant by the terminal. Alternatively, theterminal may apply the first method to uplink control channeltransmission for transmitting periodic channel information and apply thesecond method or the third method to the uplink control channel fortransmitting HARQ-ACK information. Alternatively, whether to apply thefirst method, the second method, or the third method may be configuredin the terminal through a higher layer signal. If the terminal receivesa configuration signal for always applying the first method to theuplink control signal through the higher layer signal, the terminalalways applies the first method and transmits the uplink controlchannel. If the terminal receives a configuration signal for alwaysapplying the second method to the uplink control signal through thehigher layer signal, the terminal always applies the second method andtransmits the uplink control channel. When the terminal receives aconfiguration signal for always applying the third method to the uplinkcontrol channel through the higher layer signal, the terminal alwaysapplies the third method and transmits the uplink control channel.

The first method, the second method, and the third method will bedescribed below in more detail.

-   -   In the first method, the eNB indicates an OFDM symbol interval        (or a start OFDM symbol and an end OFDM symbol or OFDM symbols        in which long PUCCH transmission should be avoided) for the long        PUCCH transmission in the downlink control channel to the UE.        The downlink control channel may be common information for group        terminals or all terminals within the cell or may be dedicated        information transmitted only to specific terminals. If long        PUCCH transmission frequency resources of the terminal overlap        short PUCCH transmission frequency resources of another terminal        in the last OFDM symbol of the slot, the eNB may prevent the        long PUCCH transmission interval from being the last OFDM symbol        of the slot. For example, if the long PUCCH transmission        interval supports OFDM symbols ranging from 4 OFDM symbols to 12        OFDM symbols (the uplink interval of the UL-centric slot 420 is        12 OFDM symbols), the eNB may indicate long PUCCH transmission        in 11 OFDM symbols instead of long PUCCH transmission in 12 OFDM        symbol through a bit field of the downlink control channel. The        terminal may transmit the long PUCCH in 11 OFDM symbols. In        another example, the long PUCCH transmission interval is        configured as a set including at least one value of the limited        symbol interval through a higher signal or defined according to        a standard, for example, if transmission is performed only in 4,        6, 8, 10, and 12 OFDM symbols through a higher layer signal or        defined according to the standard, the eNB may indicate long        PUCCH transmission in 10 OFDM symbols through the bit field of        the downlink control channel in order to avoid a collision with        short PUCCH transmission resources in the last OFDM symbol. The        terminal may transmit the long PUCCH in 10 OFDM symbols.    -   Alternatively, the eNB may indicate the short PUCCH transmission        interval (or whether the interval is the last OFDM symbol, the        second-last OFDM symbol, or the last two OFDM symbols) to the        terminal, thereby avoiding a resource collision with the long        PUCCH.    -   In the second method, the eNB configures an OFDM symbol interval        (or a start OFDM symbol and an end OFDM symbol or OFDM symbols        in which long PUCCH transmission should be avoided) for long        PUCCH transmission to the terminal through a higher layer        signal. Short PUCCH transmission frequency resources may be        configured to have distributed PRBs or localized PRBs. If short        PUCCH transmission frequency resources have distributed PRBs,        there is a high probability of a collision with long PUCCH        transmission frequency resources, so the eNB may prevent the        long PUCCH transmission OFDM symbol interval from being OFDM        symbols in which the short PUCCH is transmitted through a higher        layer signal, that is, the last OFDM symbol. For example, the        eNB may configure the long PUCCH transmission interval as 10        OFDM symbols in the terminal through a higher layer signal, and        the terminal may perform long PUCCH transmission in 10 OFDM        symbols.    -   In the third method, the eNB configures whether to perform long        PUCCH transmission or short PUCCH transmission in the terminal        through a higher layer signal or a physical downlink control        signal and correlates the OFDM symbol interval for long POUCCH        transmission with the number of uplink OFDM symbols according to        a slot format. However, the eNB may provide information on        whether long PUCCH transmission can be performed in the last one        or two OFDM symbols to the terminal. The terminal may receive        the configuration information and determine whether to transmit        the long PUCCH or the short PUCCH. If the terminal receives the        indication information and performs long PUCCH transmission, the        terminal may determine information on whether the long PUCCH        transmission can be performed in the last one or two OFDM        symbols. For example, if it is assumed that the uplink OFDM        symbol interval corresponds to 11 OFDM symbols in the slot, the        terminal may determine that the long PUCCH transmission is        performed in the 11 OFDM symbols on the basis of the uplink OFDM        symbol interval of the slot. The terminal may receive the        indication information and determine whether to perform the long        PUCCH transmission in 11 OFDM symbols, in 10 OFDM symbols, or 9        OFDM symbols. If the long PUCCH is transmitted in 10 OFDM symbol        or 9 OFDM symbols, the long PUCCH symbols may be punctured or        rate-matched from the back on the basis of the long PUCCH        transmission in 11 OFDM symbols. Information on the uplink OFDM        symbol interval of the slot may be received by the terminal from        the downlink control channel, and the downlink control channel        may be common information to group terminals or all terminals in        the cell, or may be dedicated information transmitted only to        specific terminals.

FIGS. 5A and 5B illustrate eNB and terminal procedures according to thefirst embodiment of the disclosure.

First, the eNB procedure will be described with reference to FIG. 5A.

In step 511, the eNB may transmit uplink control channel configurationinformation to the terminal. The uplink control channel configurationinformation may include an available set including the long PUCCH orshort PUCCH frequency PRB resources or at least one value of the OFDMsymbol interval as described with reference to FIG. 4. In order to avoida short PUCCH or long PUCCH transmission resource collision betweenterminals, the eNB may transmit the uplink control channel configurationinformation to the terminal through a higher layer signal.

In step 512, the eNB may transmit a downlink control channel to theterminal. The downlink control channel may include a bit fieldindicating the short PUCCH or long PUCCH frequency PRBs, the time OFDMsymbol interval, the start OFDM symbol and the end OFDM symbol, or theOFDM symbols in which long PUCCH transmission should be avoided asdescribed with reference to FIG. 4. In order to avoid a short PUCCH orlong PUCCH transmission resource collision between terminals, the eNBmay transmit the downlink control channel configuration information tothe terminal. The downlink control channel may be common information forgroup terminals or all terminals within the cell or may be dedicatedinformation transmitted only to specific terminals.

In step 513, the eNB may receive an uplink control channel from theterminal in the short PUCCH or long PUCCH transmission time throughfrequency resources indicated in step 511 or 512.

Next, the terminal procedure will be described with reference to FIG.5B.

In step 521, the terminal may receive uplink control channelconfiguration information from the eNB. The uplink control channelconfiguration information may include an available set including thelong PUCCH or short PUCCH frequency PRB resources or at least one valueof the time OFDM symbol interval as described with reference to FIG. 4,and the terminal may receive the information from the eNB through ahigher signal in order to avoid a short PUCCH or long PUCCH transmissionresource collision between terminals.

In step 522, the terminal may receive a downlink control channel fromthe eNB. The downlink control channel may include a bit field indicatingthe short PUCCH or long PUCCH frequency PRBs, the time OFDM symbolinterval, the start OFDM symbol and the end OFDM symbol, or the OFDMsymbols in which the long PUCCH transmission should be avoided, asdescribed with reference to FIG. 4, and the information may be receivedin order to avoid short PUCCH or long PUCCH transmission resourcecollision between terminals. The downlink control channel may be commoninformation for group terminals or all terminals within the cell or maybe dedicated information transmitted only to specific terminals.

In step 523, the terminal may transmit the uplink control channel to theeNB in the short PUCCH or long PUCCH transmission time and frequencyresources received in step 521 or 522.

FIG. 6 illustrates a second embodiment of the disclosure.

FIG. 6 describes a method by which the terminal receives an OFDM symbolinterval of the long PUCCH of the uplink control channel (or start OFDMsymbol and end symbol locations or OFDM symbols in which the long PUCCHis not transmitted) on the basis of the slot having 14 OFDM symbols andtransmits the uplink control channel. However, it may be noted that themethod can be applied to the case in which the terminal receives an OFDMsymbol interval (or the start OFDM symbol location and end symbollocation, or OFDM symbols in which the long PUCCH is not transmitted) ofthe long PUCCH of the uplink control channel on the basis of themini-slot and transmits the uplink control channel.

As described above, 5G supports various slot formats, for example, theDL-only slot, the DL-centric slot, the UL-only slot, and the UL-centricslot. In each slot format, a downlink period, a GP, and an uplink periodmay be configured by various OFDM symbols. The slot format and theformat structure (the number of OFDM symbols of the downlink period, theGP, and the uplink period) may be received by the terminal through ahigher layer signal or an L1 signal.

In order to improve coverage of the terminal, slot aggregation may beconfigured in the terminal through a higher layer signal, or may beindicated by an L1 signal. The terminal in which slot aggregation isconfigured or for which slot aggregation is indicated and which isconfigured or indicated to transmit the long PUCCH transmits the longPUCCH through a plurality of slots.

Like the slot format illustrated in FIG. 6, the plurality of slots mayhave various slot formats. If slot aggregation over N slots isconfigured in or indicated to the terminal, the long PUCCH may not betransmitted or the number of uplink OFDM symbols for transmitting thelong PUCCH may vary depending on a slot format of the N slots or aformat structure. It is assumed that slot #n is a UL-only slot in whichthe long PUCCH can be transmitted through 14 OFDM symbols, slot #(n+1)is a UL-centric slot in which the long PUCCH can be transmitted through12 OFDM symbols, and slot #(n+2) is a DL-centric slot in which the longPUCCH can be transmitted through 5 OFDM symbols, but SRS transmissionresources collide with long PUCCH transmission resources in the lastsymbol, and thus the long PUCCH can be actually transmitted through 4OFDM symbols in FIG. 6. Slot #(n+3) is a DL-only slot and thus cannottransmit the long PUCCH. It is assumed that slot #(n+4) is a UL-centricslot in which the long PUCCH can be transmitted through 11 OFDM symbolsbut short PUCCH transmission resources collide with long PUCCHtransmission resources in the last two OFDM symbols, and thus the longPUCCH can be transmitted through 9 OFDM symbols.

A method of configuring slot aggregation and a method by which theterminal transmits the long PUCCH according to the configured slotaggregation will be described with reference to FIG. 6.

In the disclosure, a first method of supporting slot aggregationconfigures how many slots are used for long PUCCH transmission.Alternatively, how many times the long PUCCH of one slot is repeatedlytransmitted in a plurality of slots may be configured. The number ofslots belonging to slot aggregation or the number of repetitivetransmissions in a plurality of slots on the assumption that long PUCCHtransmission in one slot is one transmission may be configured in orindicated to the terminal by a higher layer signal or an L1 signal. Theterminal may count the number of long PUCCH transmissions according tothe slot aggregation configuration. If the counted number of repetitivelong PUCCH transmissions is the same as long PUCCH transmissionsincluded in the slot aggregation configuration information, the terminalmay stop the repetitive long PUCCH transmission. Two methods by whichthe terminal counts the number of long PUCCH transmissions will bedescribed.

In a first method, if 4 symbols, which correspond to the minimum numberof symbols for long PUCCH transmission in one slot, or more can betransmitted, the terminal may count long PUCCH transmissions. If 4 longPUCCH transmissions, which correspond to long PUCCH transmissionsincluded in the slot aggregation configuration information, areconfigured or transmission of a first long PUCCH in slot #n is indicatedas HARQ-ACK for a specific PDSCH or configured or scheduled CQItransmission through a downlink control channel or a higher layer signalin FIG. 6, long PUCCH transmissions in slot #(n+1), slot #(n+2), andslot #(n+4) may be continuously performed and then the number oftransmissions may be counted each time. Since 4 long PUCCH transmissionsare satisfied after long PUCCH transmission in slot #(n+4), the terminalmay not perform long PUCCH transmission after slot #(n+4) as HARQ-ACK orCQI transmission.

In a second method, the terminal may count long PUCCH transmissions onlyfor long PUCCH transmissions performed through K symbols or more in oneslot. K may be configured through a higher layer signal or a physicalsignal. If K is configured as 7 symbols and 3 long PUCCH transmissions,which correspond to long PUCCH transmissions included in the slotaggregation configuration information, are configured or transmission ofthe first long PUCCH in slot #n is indicated as HARQ-ACK for a specificPDSCH or configured or scheduled CQI transmission through a downlinkcontrol channel or a higher layer signal in FIG. 6, the terminal maycontinuously perform long PUCCH transmissions in slot #(n+1) and slot#(n+4) and then count the number of transmissions each time. However,since 3 long PUCCH transmissions through 7 symbols or more are satisfiedafter long PUCCH transmission in slot #(n+4), the terminal may notperform long PUCCH transmission after slot #(n+4) as HARQ-ACK or CQItransmission. Since only long PUCCH transmission through 4 symbols inslot #(N+2) can be performed, the long PUCCH in slot #(n+2) can betransmitted or not by the terminal, but long PUCCH transmission in slot#(n+2) is not counted as transmission for slot aggregation.

Subsequently, a second method of supporting slot aggregation in thedisclosure configures how many uplink OFDM symbols are used for longPUCCH transmission over a plurality of slots. The number of uplink OFDMsymbol transmissions for which slot aggregation is performed may beconfigured in or indicated to the terminal by a higher signal or an L1signal. When transmitting the long PUCCH according to the slotaggregation configuration, the terminal may count the number of uplinkOFDM symbols over a plurality of slots. If the counted number of uplinkOFDM symbols is the same as the number of uplink OFDM symbols includedin the slot aggregation configuration information, the terminal may stopthe repetitive long PUCCH transmission. Two methods by which theterminal counts the number of uplink OFDM symbols in the long PUCCHtransmission will be described.

In a first method, if 4 symbols, which correspond to the minimum numberof symbols for long PUCCH transmission in one slot, or more can betransmitted, the terminal may count the number of uplink OFDM symbolsfor long PUCCH transmission. FIG. 6 illustrates an example of the casein which the number of uplink OFDM symbols for long PUCCH transmissionincluded in the slot aggregation configuration information is 34 andtransmission of the first long PUCCH in slot #n is indicated by adownlink control channel or a higher layer signal as HARQ-ACK for aspecific PDSCH or configured or scheduled CQI transmission. At thistime, the number of uplink OFDM symbols after transmission in slot #n is14, the accumulated number of uplink OFDM symbols after long PUCCHtransmission in slot #(n+1) is 26, the accumulated number of uplink OFDMsymbols after long PUCCH transmission in slot #(n+2) is 30, and theaccumulated number of uplink OFDM symbols after long PUCCH transmissionin slot #(n+4) is 39, and thus long PUCCH transmission in 34 uplink OFDMsymbols is satisfied after long PUCCH transmission in slot #(n+4), andaccordingly the terminal may not perform long PUCCH transmission afterslot #(n+4) as the HARQ-ACK or the CQI transmission.

In a second method, the terminal may count the number of OFDM symbolsfor long PUCCH transmission only for long PUCCH transmission performedthrough K symbols or more in one slot. K may be configured through ahigher layer signal or a physical signal. FIG. 6 illustrates an exampleof the case in which, if K is configured as 7 symbols, the number ofuplink OFDM symbols for long PUCCH transmission included in the slotaggregation configuration information is 30 and transmission of thefirst long PUCCH in slot #n is indicated by a downlink control channelor a higher layer signal as HARQ-ACK for a specific PDSCH or configuredor scheduled CQI transmission. At this time, since the number of uplinkOFDM symbols after transmission in slot #n is 14, the accumulated numberof uplink OFDM symbols after long PUCCH transmission in slot #(n+1) is26, and the number of long PUCCH uplink OFDM symbols which can betransmitted in slot #(n+2) is 4, the terminal may not count the longPUCCH uplink OFDM symbols. Continuously, the accumulated number ofuplink OFDM symbols after long PUCCH transmission in slot #(n+4) is 35and thus long PUCCH transmission in 30 uplink OFDM symbols is satisfiedafter long PUCCH transmission in slot #(n+4), and accordingly theterminal may not perform long PUCCH transmission after slot #(n+4) asthe HARQ-ACK or the CQI transmission. Since only long PUCCH transmissionperformed through 4 symbols in slot #(n+2) can be performed, theterminal may transmit the long PUCCH in slot #(n+2) or not, but thenumber of uplink OFDM symbols for long PUCCH transmission in slot #(n+2)may not counted as transmission for slot aggregation.

In the first and second methods of supporting slot aggregation asanother terminal operation for slot aggregation, the terminal maycontinuously perform slot aggregation without stopping the same eventhough a downlink slot exists during slots for slot aggregation. On theother hand, different terminal operation may be performed in the case inwhich the terminal receives dynamic signaling and operates in TDD andthe case in which the terminal receives semi-static signaling andoperates in TDD. In other words, if slot aggregation is performed andslots in TDD are determined through semi-static signaling, the terminalmay continuously perform long PUCCH transmission until the slotaggregation configuration is satisfied as in the first and secondmethods without stopping slot aggregation even though a downlink slotexists during slots. However, if slot aggregation is performed and slotsin TDD are determined through dynamic signaling, the terminal maydetermine that the eNB intentionally operates a slot that makes slotaggregation not performed anymore and thus the terminal may stop slotaggregation and may not perform long PUCCH transmission anymore if adownlink slot exists during slots.

In another terminal operation for slot aggregation, the case in whichthe eNB configures the slot aggregation in the terminal as in the firstand second methods and then transmission of the first long PUCCH in slot#n is indicated as HARQ-ACK for a specific PDSCH or configured orscheduled CQI transmission through a downlink control channel or ahigher layer signal is described as an example. At this time, aftertransmission of the long PUCCH in slot #n, if the eNB succeeds indecoding of the long PUCCH even though long PUCCH transmission does notend as configured by slot aggregation, the eNB may schedule a newPDCCH/PDSCH or schedule transmission of new CQI. Accordingly, theterminal may be required to monitor the new PDCCH, receive the newPDSCH, and transmit the long PUCCH. If transmission of new CQI isscheduled, even when the previous long PUCCH transmission operation isnot finished as configured by slot aggregation, the terminal may stopthe long PUCCH transmission operation and may start long PUCCHtransmission for the new PDSCH or long PUCCH transmission for the newCQI as configured by slot aggregation.

In another terminal operation for slot aggregation, if the eNBconfigures the slot aggregation in the terminal as in the first andsecond methods, the eNB may configure the slot aggregation including afirst value and a second value in each of the methods in the terminalthrough a higher layer signal. In other words, the first and secondvalues may be first and second values for repetitive long PUCCHtransmission in the first method and may be first and second values forthe number of uplink OFDM symbols for long PUCCH transmission in thesecond method. The terminal may receive the first value and the secondvalue included in the slot aggregation configuration information,perform long PUCCH transmission as configured in slot aggregation beforethe first value is satisfied in each method, and may not perform otherPDCCH monitoring, other PDSCH reception, and other PUCCH transmission.Before the second value is satisfied after the first value is satisfied,the eNB may schedule a new PDSCH even though long PUCCH transmissionconfigured in slot aggregation is not finished. Alternatively, if theeNB schedules transmission of new CQI, the terminal may be required toreceive a new PDSCH and transmit the long PUCCH. Alternatively, iftransmission of new CQI is scheduled, even when the previous long PUCCHtransmission operation is not finished as configured by slotaggregation, the terminal may stop the long PUCCH transmission operationand may start long PUCCH transmission for the new PDSCH or long PUCCHtransmission for the new CQI as configured by slot aggregation.

In another terminal operation for slot aggregation, if the eNBconfigures the slot aggregation in the terminal, the terminal maytransmit the first long PUCCH in PUCCH transmission resources implicitlyor explicitly determined by PUCCH transmission resources. The terminalmay transmit the remaining long PUCCHs configured by the slotaggregation in PUCCH transmission resources configured by a higher layersignal.

In another terminal operation for slot aggregation, if the eNBconfigures the slot aggregation in the terminal, the terminal may startfirst long PUCCH transmission when there is no transmission of HARQ-ACKfor a previous PDSCH transmitted by slot aggregation or previouslyscheduled or there is no PUCCH transmission or PUSCH transmission forpreviously scheduled or configured CQI transmission.

Next, a third embodiment in which the terminal transmits the long PUCCHin every slot when slot aggregation is configured as shown in FIG. 6will be provided through FIG. 7.

Like the slot format illustrated in FIG. 7, the plurality of slots mayhave various slot formats. If slot aggregation performed over four slotsis configured in or indicated to the terminal, the number of uplink OFDMsymbols through which the long PUCCH can be transmitted may varydepending on the slot format of the four slots or the format structure.In FIG. 7, slot #n is a UL-only slot in which the long PUCCH can betransmitted in 14 OFDM symbols. Slot #(n+1) is a UL-centric slot inwhich the long PUCCH can be transmitted in 12 OFDM symbols. It isassumed that slot #(n+2) is a UL-centric slot in which the long PUCCHcan be transmitted through 11 OFDM symbols but short PUCCH transmissionresources collide with long PUCCH transmission resources in the lastsymbol, and thus the long PUCCH can be transmitted through 10 OFDMsymbols. It is assumed that slot #(n+3) is a UL-centric slot in whichthe long PUCCH can be transmitted through 11 OFDM symbols buttransmission resources of the short PUCCH and the SRS collide withtransmission resources of the long PUCCH in the last two OFDM symbols,and thus the long PUCCH can be transmitted through 9 OFDM symbols. Atthis time, in order to avoid a collision with uplink control channeltransmission resources in a short time region, such as the short PUCCHor the SRS, a method by which long PUCCH transmission resources areindicated to the terminal is provided.

The method according to the third embodiment of the disclosure may belargely divided into three methods. In a first method, in order to avoida collision between long PUCCH transmission resources and uplink controlchannel transmission resources in the short time region in a pluralityof slots belonging to slot aggregation by a third signal, the eNB maydirectly indicate the long PUCCH transmission resources to the terminalthrough a first signal. Alternatively, the eNB may implicitly(indirectly) indicate the long PUCCH transmission resources to theterminal through definition in the standard for correlating the longPUCCH transmission resources with the number of uplink OFDM symbols orthe number of GP OFDM symbols of the slot. The terminal may determinethe plurality of slots to which slot aggregation is applied through thethird signal and perform long PUCCH transmission in the transmissionresources indicated by the plurality of slots through reception of thefirst signal or the implicit method. The first signal or the thirdsignal may be configured by a higher signal, a physical signal, or acombination of the higher signal and the physical signal. The firstsignal may include an OFDM symbol interval (or a start OFDM symbol andan end OFDM symbol) in the time region and PRBs in the frequency regionfor transmission of the long PUCCH corresponding to the number of slotsapplied to slot aggregation in order to apply the same to each slot of aplurality of slots to which the slot aggregation is applied.Alternatively, the first signal may include an OFDM symbol interval (ora start OFDM symbol and an end OFDM symbol) in the time region and PRBsin the frequency region for transmission of the long PUCCH to be appliedto a plurality of slots to which the slot aggregation is applied incommon. The third signal may include relevant information for performingslot aggregation, such as information on the number of slots to whichslot aggregation is applied or the number of uplink OFDM symbols andinformation on indexes of the slots to which slot aggregation isapplied.

In a second method, in order to avoid a collision between long PUCCHtransmission resources and uplink control channel transmission resourcesin the short time region in a plurality of slots belonging to slotaggregation by a third signal, the eNB may directly indicate the longPUCCH transmission resources to the terminal through a first signal anda second signal. The terminal may perform long PUCCH transmission intransmission resources in one slot indicated by reception of the firstsignal and the second signal. The first signal may include a higherlayer signal and the second signal may include a physical signal. Thefirst signal may include available sets of the OFDM symbol interval (orthe start OFDM symbol and the end OFDM symbol) in the time region andPRBs in the frequency region for transmitting the long PUCCH, and thesecond signal may select and indicate one of the available sets. Thethird signal may include relevant information for performing slotaggregation, such as information on the number of slots to which slotaggregation is applied or the number of uplink OFDM symbols andinformation on indexes of the slots to which slot aggregation isapplied.

In a third method, the eNB may directly/indirectly indicate in advancelong PUCCH transmission resources in one slot to the terminal throughthe first signal or through definition in the standard for correlatingthe long PUCCH transmission resources with the number of uplink OFDMsymbols and the number of GP OFDM symbols of the slot. The eNB mayreduce or control the long PUCCH transmission resources indicated inadvance through the second signal in a plurality of slots belonging toslot aggregation in order to avoid the collision with the uplink controlchannel transmission resources in the short time region in a pluralityof slots belonging to slot aggregation through the third signal. Theterminal may determine in advance the long PUCCH transmission intervalon the basis of reception of the first signal or the uplink/downlinkOFDM symbols and the number of GP OFDM symbols in the slot. Further, theterminal may determine a plurality of slots to which slot aggregation isapplied through the third signal. The terminal may perform long PUCCHtransmission by controlling the long PUCCH transmission resources in aplurality of slots through reception of the second signal. The firstsignal, the second signal, and the third signal may be configured by ahigher signal, a physical signal, or a combination of the higher signaland the physical signal. The first signal includes the OFDM symbolinterval (or the start OFDM symbol and the end OFDM symbol) in the timeregion and PRBs in the frequency region for transmission of the longPUCCH. The second signal may include an OFDM symbol interval (or a startOFDM symbol and an end OFDM symbol) in the time region and PRBs in thefrequency region, in which the long PUCCH cannot be transmitted,corresponding to the number of slots to which slot aggregation isapplied in order to apply the same to each slot of a plurality of slotsto which the slot aggregation is applied. Alternatively, the secondsignal may include an OFDM symbol interval (or a start OFDM symbol andan end OFDM symbol) in the time region and PRBs in the frequency region,in which the long PUCCH cannot be transmitted, in order to apply thesame to a plurality of slots to which the slot aggregation is applied incommon. The third signal may include relevant information for performingslot aggregation, such as information on the number of slots to whichslot aggregation is applied or the number of uplink OFDM symbols andinformation on indexes of the slots to which slot aggregation isapplied.

The first method may be suitable for uplink control channel transmissionsuch as periodic channel information transmission configured in theterminal for period transmission without a scheduling grant, and thesecond and third methods may be suitable for uplink control channeltransmission such as HARQ-ACK transmission configured in the terminalfor aperiodic transmission with a scheduling grant. Accordingly, thefirst method and the second method/the third method may be appliedaccording to whether the uplink control channel transmitted by theterminal is triggered by the scheduling grant or transmitted uplinkcontrol information is periodic channel information or HARQ-ACK. Forexample, the first method may be applied to the uplink control channeltransmission configured to be transmitted by the terminal without thescheduling grant, and the second method/the third method may be appliedto the uplink control channel if transmission of the uplink controlchannel is triggered by the scheduling grant by the terminal.Alternatively, the terminal may apply the first method to uplink controlchannel transmission for transmitting periodic channel information andapply the second method/the third method to the uplink control channelfor transmitting HARQ-ACK information. Alternatively, whether to applythe first method or the second method/the third method may be configuredin the terminal through a higher layer signal. If the terminal receivesa configuration signal for always applying the first method to theuplink control channel through the higher layer signal, the terminal mayalways apply the first method and transmit the uplink control channel.If the terminal receives a configuration signal for always applying thesecond method to the uplink control channel through the higher layersignal, the terminal may always apply the second method and transmit theuplink control channel. If the terminal receives a configuration signalfor always applying the third method to the uplink control channelthrough the higher layer signal, the terminal may always apply the thirdmethod and transmit the uplink control channel.

The first method and the second method will be described below in moredetail.

-   -   In the first method, if slot aggregation is configured by a        higher layer signal or in the downlink control channel        indicating slot aggregation, the eNB indicates an available max.        OFDM symbol interval (for example, a start OFDM symbol and an        end OFDM symbol or whether the OFDM symbol in which long PUCCH        transmission should be avoided is the last one symbol or the        last two OFDM symbols) for long PUCCH transmission to the        terminal through the higher signal or the downlink control        channel. The downlink control channel may be common information        for group terminals or all terminals within the cell or may be        dedicated information transmitted only to specific terminals. In        the above example, the eNB may configure the long PUCCH        transmission interval as the max. OFDM symbols in which long        PUCCH transmission can be performed among 14 OFDM symbols        available in slot #n, 12 OFDM symbols available in slot #(n+1),        10 OFDM symbols available in slot #(n+2), and 9 OFDM symbols        available in slot #(n+3). For example, if the long PUCCH        transmission interval supports OFDM symbols ranging from 4 OFDM        symbols to 12 OFDM symbols, the eNB may indicate long PUCCH        transmission in 9 OFDM symbols through a bit field of the        downlink control channel. The terminal may transmit the long        PUCCH in 9 OFDM symbols in each of four slots from slot #n to        slot #(n+3). In another example, if the long PUCCH transmission        interval is configured as a set of the limited symbol intervals        through a higher signal or defined according to a standard, for        example, if transmission only in 4, 6, 8, 10, and 12 OFDM        symbols is configured through a higher signal or defined        according to a standard, the eNB may indicate long PUCCH        transmission in 8 OFDM symbols through a bit field of the        downlink control channel in order to avoid a collision with        short PUCCH or SRS transmission resources in all slots belonging        to slot aggregation. The terminal may transmit the long PUCCH in        8 OFDM symbols.    -   In the second method, if slot aggregation is configured through        a higher layer signal or in the downlink control channel        indicating slot aggregation, the eNB may indicate in advance the        OFDM symbol interval (or a start OFDM symbol and an end OFDM        symbol, or whether the OFDM symbol in which long PUCCH        transmission should be avoided is the last one OFDM symbol or        the last two OFDM symbols) for all slots belonging to slot        aggregation to the terminal. The downlink control channel may be        common information for group terminals or all terminals within        the cell or may be dedicated information transmitted only to        specific terminals. In the above example, the eNB may configure        the long PUCCH transmission interval corresponding to 11 symbols        in the terminal through a higher layer signal. The eNB may        indicate 14 OFDM symbols transmittable in slot #n, 12 OFDM        symbols transmittable in slot #(n+1), 10 OFDM symbols        transmittable in slot #(n+2), and 9 OFDM symbols transmittable        in slot #(n+3) through a downlink control channel. For example,        if the long PUCCH transmission interval supports OFDM symbols        ranging from 4 OFDM symbols to 12 OFDM symbols, the eNB may        configure long PUCCH transmission in 11 OFDM symbols through a        higher layer signal. The eNB may indicate whether long PUCCH        transmission can be performed in the last OFDM symbol or the        last two OFDM symbols in four slots from slot #n to slot #(n+3)        through a downlink control channel. The terminal may receive the        configuration information and indication information and        transmit the long PUCCH in 11, 11, 10, and 9 OFDM symbols in the        four slots from slot #n to slot #(n+3), respectively.

In another example, if the long PUCCH transmission interval isconfigured as a set of the limited symbol intervals through a higherlayer signal or defined according to a standard, for example, iftransmission only in 4, 6, 8, 10, and 12 OFDM symbols is configuredthrough a higher layer signal or defined according to a standard, theeNB may indicate long PUCCH transmission in 10 OFDM symbols through ahigher layer signal in order to avoid a collision with short PUCCH orSRS transmission resources in all slots belonging to slot aggregation.The eNB may indicate whether long PUCCH transmission can be performed inthe last OFDM symbol or the last two OFDM symbols in four slots fromslot #n to slot #(n+3) through a downlink control channel. The terminalmay receive the configuration information and indication information andtransmit the long PUCCH in 10, 10, 10, and 8 OFDM symbols in the fourslots from slot #n to slot #(n+3), respectively.

-   -   In the third method, the eNB configures an OFDM symbol interval        (or a start OFDM symbol and an end OFDM symbol or OFDM symbols        in which long PUCCH transmission should be avoided) for long        PUCCH transmission in the terminal through a higher layer        signal. Short PUCCH transmission frequency resources may be        configured to have distributed PRBs or localized PRBs. If short        PUCCH transmission frequency resources have distributed PRBs,        there is a high probability of a collision with long PUCCH        transmission frequency resources, so the eNB may prevent the        long PUCCH transmission OFDM symbol interval from being OFDM        symbols in which the short PUCCH is transmitted through a higher        layer signal, that is, the last OFDM symbol. For example,        transmission of the long PUCCH transmission interval in 8 OFDM        symbols may be configured in the terminal through a higher layer        signal. If performance of slot aggregation is configured, the        terminal may perform long PUCCH transmission in 8 OFDM symbols        in all slots belonging to slot aggregation.    -   In the fourth method, the eNB may configure whether to perform        long PUCCH transmission or short PUCCH transmission in the        terminal through a higher layer signal or a physical downlink        control signal and correlate the OFDM symbol interval for long        PUCCH transmission with the number of uplink OFDM symbols        according to a slot format. At this time, the BS indicates        information on whether long PUCCH transmission can be performed        in the last one or two OFDM symbols in each or all of the slots        belonging to slot aggregation to the terminal through the higher        signal or the physical signal. The terminal may receive the        configuration information and determine whether to transmit the        long PUCCH or the short PUCCH. If the terminal receives the        indication information and performs long PUCCH transmission, the        terminal may determine information on whether the long PUCCH        transmission can be performed in the last one or two OFDM        symbols in all slot belonging to slot aggregation. In the        indication information, one bit field may be applied to all        slots belonging to slot aggregation, or each bit field may be        applied to each slot. If one bit field is applied to all slots        belonging to slot aggregation and long PUCCH transmission cannot        be performed in the last one OFDM symbols, based on the        assumption that the uplink OFDM symbol interval is 14, 12, 11,        and 9 OFDM symbols in all slots belonging to slot aggregation,        the terminal may determine that the long PUCCH transmission is        performed in 14, 12, 11, and 9 OFDM symbol interval on the basis        of the uplink OFDM symbol intervals in the slots, receive the        indication information, and perform the long PUCCH transmission        in 13, 11, 10, and 8 OFDM symbols in every slot. If the long        PUCCH transmission is performed in 13, 11, 10, and 8 OFDM        symbols, the long PUCCH symbols may be punctured or rate-matched        from the back on the basis of the long PUCCH transmission in 14        OFDM symbols. Information on the uplink OFDM symbol interval of        the slot may be received by the terminal from the downlink        control channel, and the downlink control channel may be common        information to group terminals or all terminals in the cell, or        may be dedicated information transmitted only to specific        terminals.

FIGS. 8A and 8B illustrate eNB and terminal procedures according to thethird embodiment of the disclosure.

First, the eNB procedure will be described with reference to FIG. 8A.

In step 811, the eNB may transmit uplink control channel configurationinformation to the terminal. The uplink control channel configurationinformation may include an available set including at least one of thelong PUCCH or short PUCCH frequency PRB resources or the time OFDMsymbol interval, information required for slot aggregation (the numberof slots belonging to slot aggregation or the number of uplink OFDMsymbols), or a max. time OFDM symbol interval for transmitting the longPUCCH in a plurality of slots belonging to slot aggregation as describedwith reference to FIG. 4 or 7. In order to avoid a short PUCCH or longPUCCH transmission resource collision between terminals, the eNB maytransmit the uplink control channel configuration information to theterminal through a higher layer signal.

In step 812, the eNB may transmit a downlink control channel to theterminal. The downlink control channel may include the short PUCCH orlong PUCCH frequency PRBs, the time OFDM symbol interval, the start OFDMsymbol and the end OFDM symbol, the bit field indicating the OFDM symbolin which transmission of the long PUCCH is avoided, information requiredfor slot aggregation (the number of slots belonging to slot aggregationor the number of uplink OFDM symbols), and the available max. time OFDMsymbol interval for transmitting the long PUCCH in a plurality of slotsbelonging to slot aggregation, as described with reference to FIG. 4 or7, and the eNB may transmit the downlink control channel to the terminalin order to avoid a short PUCCH or long PUCCH transmission resourcecollision between terminals. The downlink control channel may be commoninformation for group terminals or all terminals within the cell or maybe dedicated information transmitted only to specific terminals.

In step 813, the eNB may receive an uplink control channel from theterminal in short PUCCH or long PUCCH transmission time and frequencyresources indicated in step 811 or 812 over a plurality of slots.

Next, the terminal procedure will be described with reference to FIG.8B.

In step 821, the terminal may receive uplink control channelconfiguration information from the eNB. The uplink control channelconfiguration information may include an available set including atleast one of the long PUCCH or short PUCCH frequency PRB resources orthe time OFDM symbol interval, information required for slot aggregation(the number of slots belonging to slot aggregation or the number ofuplink OFDM symbols), or a max. time OFDM symbol interval fortransmitting the long PUCCH in a plurality of slots belonging to slotaggregation, as described with reference to FIG. 4 or FIG. 7, and theterminal may receive the uplink control channel configurationinformation from the eNB through a higher signal in order to avoid ashort PUCCH or long PUCCH transmission resource collision betweenterminals.

In step 822, the terminal may receive a downlink control channel fromthe eNB. The downlink control channel may include the short PUCCH orlong PUCCH frequency PRBs, the time OFDM symbol interval, the start OFDMsymbol and the end OFDM symbol, the bit field indicating the OFDM symbolin which transmission of the long PUCCH is avoided, information requiredfor slot aggregation (the number of slots belonging to slot aggregationor the number of uplink OFDM symbols), and the available max. time OFDMsymbol interval for transmitting the long PUCCH in a plurality of slotsbelonging to slot aggregation, and the terminal may receive the downlinkcontrol channel in order to avoid a short PUCCH or long PUCCHtransmission resource collision between terminal as described withreference to FIG. 4 or 7. The downlink control channel may be commoninformation for group terminals or all terminals within the cell or maybe dedicated information transmitted only to specific terminals.

In step 823, the terminal may transmit an uplink control channel to theeNB in the short PUCCH or long PUCCH transmission time and frequencyresources indicated in step 821 or 822 over a plurality of slots.

Next, FIG. 9 illustrates an eNB apparatus according to an embodiment ofthe disclosure.

Referring to FIG. 9, an eNB may include a controller 901 and atransceiver 907. The eNB may further include a scheduler 905. Accordingto an embodiment of the disclosure, the controller 901 may be defined asa circuit, an application-specific integrated circuit, or at least oneprocessor.

The transceiver 907 may transmit/receive a signal to/from anothernetwork entity. For example, the transceiver 907 may transmit a signalto the terminal and receive a signal from the terminal. Alternatively,the transceiver 907 may transmit and receive a signal to and fromanother eNB.

The controller 901 may control overall operation of the eNB. Thecontroller 901 may control uplink control channel transmission resourcesaccording to the eNB procedures illustrated in FIGS. 5A, 5B, 8A, and 8Bof the disclosure and the uplink control channel configuration and themethod of configuring the uplink control channel in time and frequencytransmission resources illustrated in FIGS. 4 and 7 of the disclosure,transmit the uplink control channel to the terminal through a 5G controlinformation transmission device 905 and the 5G data transceiver 907,schedule 5G data through the scheduler 903, and transmit and receive 5Gdata to and from the 5G terminal through the 5G data transceiver 907.

According to an embodiment of the disclosure, the controller 901 maycontrol the transceiver 907 to transmit PUCCH configuration informationincluding first information on PUCCH resources and second information onthe number of slots for repeatedly transmitting the PUCCH.

The controller 910 may control the transceiver 907 to repeatedly receivethe PUCCH through slots determined by the terminal on the basis of thePUCCH configuration information and slot format information.

At this time, if the number of slots for repeatedly transmitting thePUCCH is larger than 1 on the basis of the second information, thedetermined slots may be slots for repeatedly transmitting the PUCCH onthe basis of information on the number of consecutive symbols fortransmitting the PUCCH and a start symbol at which transmission of thePUCCH starts in each of the PUCCH transmission slots, included in thefirst information.

Further, if a symbol corresponding to the start symbol is an uplink (UL)symbol and consecutive UL symbols larger than or equal to the number ofconsecutive symbols for transmitting the PUCCH are included inpredetermined slots according to the slot format information, thepredetermined symbol may be determined as the slot for repeatedlytransmitting the PUCCH.

Meanwhile, the controller 910 may control the transceiver 907 totransmit the PUCCH configuration information and the slot formatinformation through higher layer signaling.

Next, FIG. 10 illustrates a terminal apparatus according to thedisclosure.

Referring to FIG. 10, a terminal may include a controller 1001 and atransceiver 1006. The terminal may further include a 5G controlinformation receiver 1005. According to an embodiment of the disclosure,the controller 1001 may be defined as a circuit, an application-specificintegrated circuit, or at least one processor.

The transceiver 1006 may transmit/receive a signal to/from anothernetwork entity. For example, the transceiver 1006 may transmit a signalto the terminal and receive a signal from the terminal.

The controller 1001 may control overall operation of the eNB.

The terminal may receive an uplink control channel transmission resourcelocation from the eNB through the 5G control information receiver 1005and the 5G data transceiver 1006 according to the terminal proceduresillustrated in FIGS. 5A, 5B, 8A, and 8B and the method of configurationthe uplink control channel and the method of configuring the uplinkcontrol channel in time and frequency transmission resources. Thecontroller 1001 may transmit and receive 5G data scheduled at thereceived resource location to and from the 5G eNB through the 5G datatransceiver 1006.

According to an embodiment of the disclosure, the controller 1001 maycontrol the transceiver 1006 to receive PUCCH configuration informationincluding first information on PUCCH resources and second information onthe number of slots for repeatedly transmitting the PUCCH. Thecontroller 1001 may determine slots for repeatedly transmitting thePUCCH on the basis of the PUCCH configuration information and slotformat information.

If the number of slots for repeatedly transmitting the PUCCH is largerthan 1 on the basis of the second information, the controller 1001 maydetermine slots for repeatedly transmitting the PUCCH on the basis ofinformation on the number of consecutive symbols for transmitting thePUCCH and a start symbol at which transmission of the PUCCH starts ineach of PUCCH transmission slots, included in the first information.

If a symbol corresponding to the start symbol is an uplink (UL) symboland consecutive UL symbols larger than or equal to the number ofconsecutive symbols for transmitting the PUCCH are included inpredetermined slots according to the slot format information, thecontroller 1001 may determine that the predetermined symbol is the slotfor repeatedly transmitting the PUCCH.

The controller 1001 may control the transceiver 1006 to receive thePUCCH configuration information and the slot format information throughhigher layer signaling.

The embodiments disclosed in the specifications and drawings areprovided merely to readily describe and to help a thorough understandingof the disclosure but are not intended to limit the scope of thedisclosure. Therefore, it should be construed that, in addition to theembodiments disclosed herein, all modifications and changes or modifiedand changed forms derived from the technical idea of the disclosure fallwithin the scope of the disclosure.

What is claimed is:
 1. A method performed by a terminal in a wirelesscommunication system, the method comprising: receiving, from a basestation, physical uplink control channel (PUCCH) configurationinformation including first information on a number of plural slots forrepetition of a PUCCH transmission, second information on a number ofconsecutive symbols for the PUCCH transmission, and third information onat least one physical resource block (PRB) for the PUCCH transmission;receiving, from the base station, downlink control information (DCI);determining the plural slots for the repetition of the PUCCHtransmission starting from a first slot indicated to the terminal by theDCI, based on the PUCCH configuration information; and transmitting, tothe base station, a PUCCH at the determined plural slots based on the atleast one PRB according to the third information, wherein each of thedetermined plural slots has the number of consecutive symbols for thePUCCH transmission according to the second information, and wherein theterminal does not perform the PUCCH transmission at a slot having anumber of symbols available for PUCCH transmission smaller than thenumber of consecutive symbols for the PUCCH transmission according tothe second information.